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docs: document cmd template function #8929

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Jul 5, 2023
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docs: document cmd template function #8929

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5 changes: 4 additions & 1 deletion docs-v2/content/en/docs/environment/templating.md
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Expand Up @@ -43,4 +43,7 @@ List of variables that are available for templating:
* `IMAGE_NAME2`, `IMAGE_REPO2`, `IMAGE_TAG2`, `IMAGE_DIGEST2` - the 2nd artifact's image name, tag, and sha256 digest
* `IMAGE_NAME2`, `IMAGE_REPON`, `IMAGE_TAGN`, `IMAGE_DIGESTN` - the Nth artifact's image name, tag, and sha256 digest

Default values can be specified using the `{{default "bar" .FOO}}` expression syntax, which results in "bar" if .FOO is nil or a zero value.
### Template functions
Besides the [built-in template functions](https://pkg.go.dev/text/template) in golang, skaffold also provides the following ones:
- `default` : Default values can be specified using the `{{default "bar" .FOO}}` expression syntax, which results in "bar" if .FOO is nil or a zero value.
- `cmd`: This allows users to use the result from external commands in template, for example `{{cmd "bash" "-c" "xxx xxx xxx"}}` can be used to execute bash script and get the result into the template.
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